Doorstop



April 14, 1925.

K. H. BECK ET AL DOORSTOP Filed April 28. 1924 FIGfB.

V INVENTURS lte-nnefh. H. Beck and Fdwara HBIQCk/Jam their afforney iii Patented Apr. 14, 1925.

UNITED STATES KENNETH H. BECK AND EDWARD H. ELACKBURN, 035

EITTSBURGH, PENNSYLVANIA.

noons'ror.

Application filed April 28, 1924. Serial No. 709,341.

To all whom it may concern:

Be it known that we, K NNETH H. BECK and EDYVARD H. BLACKBURN, citizens of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in a Door-stop, of which the following is a specification.

This invention relates to a doorstop.

Several forms of doorstop have been hitherto devised which may be secured to a floor either directly, or by the use of a plate or the like to which the doorstop is in turn secured. Such prior devices, however, are adapted for use with relatively light doors of wood or the like, and are not of such nature as to withstand the blows of heavy metal doors without breakage of the stop itself, shearing of its securing means, or loosening such securing means from engagement with the floor in which they are set.

The object of the present invention is to provide a doorstop so designed, and so secured in a floor, that it is capable of withstanding blows from heavy metal doors.

A further object of the invention is to provide a doorstop so arranged that its sup porting means may be set deeply into a concrete floor and which is so designed and proportioned, that the shock of blows delivered by a heavy door are distributed in such a manner as to minimize the shearing stress on the supporting means of the bolt.

In the accompanying drawings Figure l is an elevation of the doorstop of the present invention; Figure 2 is a plan view thereof; and Figure 3 is a vertical sectional view through the doorstop and the section of floor in which it is set.

In the drawings, the reference numeral 1 designates the base of the doorstop from which extends a stem or pedestal 2 sur mounted by body member 3. In a peripheral-groove 4; of the body member 8, is a heavy washer 5 which is of hard rubber or some similar tough and elastic material.

The supporting means for the stop comprise a bolt 6, which is set with its head 7 downward in an orifice in a floor 8, which is shown as formed of cement. concrete, or similar cementing material. The cavity in the floor 8 into which the bolt extends, is filled, after insertion of the bolt, with cement, or with some denser and tougher material. For this purpose, a filling 9 of molten sulfur is preferably poured into the cavity to surround and enclose the bolt. If so desired, a washer 1.0 may be added to the bolt adjacent the head 7 as an additional anchor therefor. The doorstop proper, which is an integral structure comprising the base 1, pedestal 2, and head or body member 3, is tapped vertically upward from the base to form a bolt hole 11 which extends almost to the upper extremity of the member. In mounting the doorstop, it is placed in position on the screw threaded portion 12 of the bolt 6, and is screwed downwardly until in close engagement with the surface of the floor 8. In order that a closecontact with the floor and a tight engagement of the bolt may be secured, the stem-orpedestal 2 of the doorstop proper is made hexagonal in cross section in order to accommodate-a wrench of usual design.

It should be noted that the extensionof the bolt through approximately the entire height of the doorstop tends to distribute the blows delivered against the stop and to minimize shearing stresses on the bolt. These shearing stresses are also distributed and rendered harmless by the wide extension of the base 2, which is of an appreciably greater diameter than the diameter of the head or body member 3 with the heavy washer 4 added thereto. It should be further noted that the base 1 of the stop is relatively thin, in order that a heavy door as usually hung, may pass over it to strike against the washer 5 of the doorstop.

It will be noted that the washer 5 is circular, that the washer and the shallow groove 4 in which it rests are provided with contacting square shoulders and that the upper extremity, or cap portion 3 of the body or head portion 3 overhangs the washer a very short distance. The relatively slight depth of the groove 4 permits the washers to be readily removed and replaced, and are sufficient to hold the washer in place because of the resiliency of the washer and the square shoulders providing the seat between it and the body member or head of the stop.

It will be noted that every feature of the doorstop illustrated and described herein contributes to the strength and efficiency of the device.

The integral stop member is in itself sturdy, while the deep penetration of the supporting bolt into the stop member, and the wide extent of the base of the stop serve to distribute stresses which might otherwise injure the stop or its securing bolt, or loosen the engagement of the bolt in the floor in which it is set.

What we claim is:

l. A stop structure for doors comprising an anchoring bolt set into a floor with its threaded portion extending above the surface thereof, an integral stop member tapped throughout approximately its entire vertical extent to receive the threaded portion of said bolt, and a washer of yielding material on said stop member.

2. A stop structure for doors comprising an anchoring bolt set into a floor with its threaded portion extending above the surface thereof, a stop member tapped vertically to receive the threaded portion of the anchoring bolt and comprising head, shank, and base portions, and a washer of yielding material on said head portion. the base portion of said stop member being arranged to extend radially outward beyond the head portion and washer of the structure.

3. A stop structure for doors comprising an anchoring bolt set into a floor with its threaded portion extending above the surface thereof, a stop member tapped vertically to receive the threaded portion of the anchoring bolt and comprisinghead. sha

and base portions, and a washer of yielding material on said head portion, the base portion of said stop member being arranged to extend radially outward beyond the head portion and washer of the structure and the shank portion of the stop member being formed to provide a wrench hold for screwing the stop member into firm engagement with the floor.

4. A stop structure for doors comprising an anchoring bolt set into a floor with its threaded portion extending above the surface of the floor, an integral stop member tapped throughout approximately its entire vertical extent to receive the threaded portion of the anchoring bolt and comprising head, shank, and base portions, and a washer of yielding material on said head portion, the base portion of said stop member being arranged to extend radially outward beyond the head portion and washer of the structure. p

In witness whereof, we hereunto set our hands.

KENNETH H. BECK. EDl/VARD H. BLACKBURN. Witnesses A. M. (ruin-1121K. 

